5 things you need to know Tuesday

USA Today and USAToday , KARE6:50 AM. CDT March 18, 2014

WASHINGTON, DC - MARCH 17: U.S. Army Staff Sergeant Christopher Schneider, from U.S. Army Old Guard, 3d U.S. Infantry Regiment, makes sure the medals are in their place on the military uniform of U.S. Army Staff Sergeant Melvin Morris, a Vietnam War veteran, for his visit to the white House on March 17, 2014 in Washington,DC. Melvin Morris and two others are the only living soldiers who will be honored with 21 others on March 18th, 2014 at the White House by President Barack Obama with the Medal of Honor for conspicuous gallantry. Following a congressionally mandated review to ensure that eligible recipients were not bypassed due to prejudice the veterans will receive the Medal of Honor for action during major combat operations in World War II, the Korean War and the Vietnam War. (Photo by Joe Raedle/Getty Images)(Photo: Joe Raedle Getty Images)

Here are 5 things you need to know for Tuesday, according to our partners at USA Today.

It's March Madness

You only have a couple more days to make those perfect picks for your March Madness tournament bracket. Fear not, for you can find everything you need to know, including our 10 bold tournament predictions, the Cinderellas who could turn your bracket upside down and the five mistakes that could ruin everything, at q.usatoday.com/ncaa.

Obama to award Medal of Honor to overlooked veterans

President Obama will award 24 Army veterans the Medal of Honor for conspicuous gallantry during World War II, the Korean War and the Vietnam War. Just three of the recipients are still alive. Learn about all of them at usatoday.com/news.

Hunt for missing jet expands to China territory

Chinese authorities started searching for Malaysia Airlines flight MH370 on Chinese territory, Xinhua, China's state news agency, said. There were 154 Chinese nationals on aboard the jetliner among the 227 passengers. It vanished on March 8.

Gravitational waves offer new insight into Big Bang

Scientists have detected ripples made in the fabric of the universe just after the Big Bang, providing definitive evidence that the universe underwent a fast and incomprehensibly massive growth spurt in its earliest infancy.

Russia folds in Crimea

Russian President Vladimir Putin has approved a draft bill for the annexation of Crimea, news agencies in Russia reported. Earlier, he signed a decree recognizing Crimea as a "sovereign and independent country."